4.21.2 string expressions

A string expression is:

1. a sequence of characters between two unescaped quotes (")
2. an identifier of type string
3. a function returning string
4. a substring (using the bracket operator)
5. a type cast to string (see string type cast)
6. string expressions combined by the operation +.

Example:

// string_expression[start, length] : a substring // (possibly filled up with blanks) // the substring of s starting at position 2 // with a length of 4 string s="123456"; s[2,4]; ==> 2345 "abcd"[2,2]; ==> bc // string_expression[position] : a character from a string s[3]; ==> 3 // string_expression[position..position] : // a substring starting at the first position up to the second // given position s[2..4]; ==> 2 3 4 // a function returning a string typeof(s); ==> string

See Type conversion and casting